Webstone’s Isolator Uni-Flange Ball Valve is now outfitted with press connections, making it faster to install any circulator pump. Press isolators are the latest additions to the rapidly expanding line of Pro-Connect Press products. Available on rotating flange Isolators with or without a drain, in sizes 3/4” through 2”. The new Pro-Connect Press Isolator is compatible with all popular press tools and guaranteed for life.